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import { Context } from "./context";
import * as Inputs from "./inputs";
import { Vector, DrawHelperCore, JSCADText } from "@bitbybit-dev/core";
import { JSCADWorkerManager } from "@bitbybit-dev/core/lib/workers";
import { OCCTWorkerManager } from "@bitbybit-dev/occt-worker";
import {
BufferAttribute, BufferGeometry, Color, Group, Mesh, MeshPhysicalMaterial,
Vector3, Float32BufferAttribute, LineBasicMaterial, LineSegments,
MeshBasicMaterial, SphereGeometry, InstancedMesh, Matrix4
} from "three";
export class DrawHelper extends DrawHelperCore {
private usedMaterials: {
sceneId: number,
hex: string,
alpha: number,
zOffset: number,
material: MeshPhysicalMaterial
}[] = [];
constructor(
private readonly context: Context,
private readonly solidText: JSCADText,
public readonly vector: Vector,
private readonly jscadWorkerManager: JSCADWorkerManager,
private readonly occWorkerManager: OCCTWorkerManager
) {
super(vector);
}
async drawShape(inputs: Inputs.OCCT.DrawShapeDto<Inputs.OCCT.TopoDSShapePointer>): Promise<Group> {
const options = { ...inputs };
if (inputs.faceMaterial) {
delete inputs.faceMaterial;
}
const decomposedMesh: Inputs.OCCT.DecomposedMeshDto = await this.occWorkerManager.genericCallToWorkerPromise("shapeToMesh", inputs);
return this.handleDecomposedMesh(inputs, decomposedMesh, options);
}
async drawShapes(inputs: Inputs.OCCT.DrawShapesDto<Inputs.OCCT.TopoDSShapePointer>): Promise<Group> {
const options = { ...inputs };
if (inputs.faceMaterial) {
delete inputs.faceMaterial;
}
const meshes: Inputs.OCCT.DecomposedMeshDto[] = await this.occWorkerManager.genericCallToWorkerPromise("shapesToMeshes", inputs);
const meshesSolved = await Promise.all(meshes.map(async decomposedMesh => this.handleDecomposedMesh(inputs, decomposedMesh, options)));
const shapesMeshContainer = new Group();
shapesMeshContainer.name = "shapesMeshContainer-" + Math.random();
this.context.scene.add(shapesMeshContainer);
meshesSolved.forEach(mesh => {
shapesMeshContainer.add(mesh);
});
return shapesMeshContainer;
}
async drawSolidOrPolygonMesh(inputs: Inputs.JSCAD.DrawSolidMeshDto<Group>): Promise<Group> {
const res: {
positions: number[],
normals: number[],
indices: number[],
transforms: [],
} = await this.jscadWorkerManager.genericCallToWorkerPromise("shapeToMesh", inputs);
let meshToUpdate;
Iif (inputs.jscadMesh && inputs.updatable) {
meshToUpdate = inputs.jscadMesh;
} else {
meshToUpdate = new Group();
meshToUpdate.name = `jscadMesh-${Math.random()}`;
this.context.scene.add(meshToUpdate);
}
let colour;
if (inputs.mesh.color && inputs.mesh.color.length > 0) {
// if jscad geometry is colorized and color is baked on geometry it will be used over anything that set in the draw options
const c = inputs.mesh.color;
colour = "#" + new Color(c[0], c[1], c[2]).getHexString();
} else {
colour = Array.isArray(inputs.colours) ? inputs.colours[0] : inputs.colours;
}
const s = this.makeMesh({ ...inputs, colour }, meshToUpdate, res);
inputs.jscadMesh = s;
return s;
}
async drawSolidOrPolygonMeshes(inputs: Inputs.JSCAD.DrawSolidMeshesDto<Group>): Promise<Group> {
return this.jscadWorkerManager.genericCallToWorkerPromise("shapesToMeshes", inputs).then((res: {
positions: number[],
normals: number[],
indices: number[],
transforms: [],
color?: number[]
}[]) => {
let localOrigin: Group;
Iif (inputs.jscadMesh && inputs.updatable) {
localOrigin = inputs.jscadMesh;
localOrigin.clear();
} else {
localOrigin = new Group();
localOrigin.name = `jscadMeshes-${Math.random()}`;
}
const colourIsArrayAndMatches = Array.isArray(inputs.colours) && inputs.colours.length === res.length;
const colorsAreArrays = Array.isArray(inputs.colours);
res.map((r, index) => {
const meshToUpdate = new Group();
meshToUpdate.name = `jscadMeshes-${Math.random()}`;
let colour;
if (r.color) {
const c = r.color;
colour = "#" + new Color(c[0], c[1], c[2]).getHexString();
} else Iif (colourIsArrayAndMatches) {
colour = inputs.colours[index];
} else Iif (colorsAreArrays) {
colour = inputs.colours[0];
} else {
colour = inputs.colours;
}
const m = this.makeMesh({ ...inputs, colour }, meshToUpdate, r);
localOrigin.add(m);
});
this.context.scene.add(localOrigin);
inputs.jscadMesh = localOrigin;
return localOrigin;
});
}
drawPolylinesWithColours(inputs: Inputs.Polyline.DrawPolylinesDto<Group>) {
let colours = inputs.colours;
const points = inputs.polylines.map((s, index) => {
const pts = s.points;
//handle jscad
if (s.isClosed) {
pts.push(pts[0]);
}
// sometimes polylines can have assigned colors in case of jscad for example. Such colour will overwrite the default provided colour for that polyline.
if (s.color) {
if (!Array.isArray(colours)) {
colours = [];
}
if (Array.isArray(s.color)) {
colours[index] = "#" + new Color(s.color[0], s.color[1], s.color[2]).getHexString();
} else E{
colours[index] = s.color;
}
}
return pts;
});
let lineSegments: LineSegments;
if (inputs.polylinesMesh && inputs.updatable) {
lineSegments = inputs.polylinesMesh.children[0] as LineSegments;
}
const polylines = this.drawPolylines(
lineSegments,
points,
inputs.updatable,
inputs.size,
inputs.opacity,
colours
);
if (inputs.polylinesMesh && inputs.updatable) {
if (inputs.polylinesMesh.children[0].name !== polylines.name) {
const group = new Group();
group.name = `polylines-${Math.random()}`;
group.add(polylines);
this.context.scene.add(group);
return group;
} else {
return inputs.polylinesMesh;
}
} else {
const group = new Group();
group.name = `polylines-${Math.random()}`;
group.add(polylines);
this.context.scene.add(group);
return group;
}
}
drawPoint(inputs: Inputs.Point.DrawPointDto<Group>): Group {
const vectorPoints = [inputs.point];
let colorsHex: string[] = [];
if (Array.isArray(inputs.colours)) {
colorsHex = inputs.colours;
} else {
colorsHex = [inputs.colours];
}
if (inputs.pointMesh && inputs.updatable) {
this.updatePointsInstances(inputs.pointMesh, vectorPoints);
} else {
inputs.pointMesh = this.createPointSpheresMesh(
`pointMesh-${Math.random()}`, vectorPoints, colorsHex, inputs.opacity, inputs.size, inputs.updatable
);
}
return inputs.pointMesh;
}
drawPolylineClose(inputs: Inputs.Polyline.DrawPolylineDto<Group>): Group {
const points = inputs.polyline.points;
Iif (inputs.polyline.isClosed) {
points.push(points[0]);
}
return this.drawPolyline(
inputs.polylineMesh,
points,
inputs.updatable,
inputs.size,
inputs.opacity,
inputs.colours
);
}
drawPolyline(mesh: Group,
pointsToDraw: Inputs.Base.Point3[],
updatable: boolean, size: number, opacity: number, colours: string | string[]): Group {
let lineSegments: LineSegments;
if (mesh && mesh.children.length > 0) {
lineSegments = mesh.children[0] as LineSegments;
}
const polylines = this.drawPolylines(lineSegments, [pointsToDraw], updatable, size, opacity, colours);
if (!mesh) {
mesh = new Group();
mesh.name = `polyline-${Math.random()}`;
mesh.add(polylines);
this.context.scene.add(mesh);
}
return mesh;
}
drawCurve(inputs: Inputs.Verb.DrawCurveDto<Group>): Group {
const points = inputs.curve.tessellate();
return this.drawPolyline(
inputs.curveMesh,
points,
inputs.updatable,
inputs.size,
inputs.opacity,
inputs.colours
);
}
drawPoints(inputs: Inputs.Point.DrawPointsDto<Group>): Group {
const vectorPoints = inputs.points;
let coloursHex: string[] = [];
if (Array.isArray(inputs.colours)) {
coloursHex = inputs.colours;
if (coloursHex.length !== inputs.points.length) {
coloursHex = inputs.points.map(() => coloursHex[0]);
}
} else {
coloursHex = inputs.points.map(() => inputs.colours as string);
}
if (inputs.pointsMesh && inputs.updatable) {
if (inputs.pointsMesh.children.length === vectorPoints.length) {
this.updatePointsInstances(inputs.pointsMesh, vectorPoints);
} else {
inputs.pointsMesh.remove();
inputs.pointsMesh = this.createPointSpheresMesh(
`pointsMesh-${Math.random()}`, vectorPoints, coloursHex, inputs.opacity, inputs.size, inputs.updatable
);
}
} else {
inputs.pointsMesh = this.createPointSpheresMesh(
`pointsMesh-${Math.random()}`, vectorPoints, coloursHex, inputs.opacity, inputs.size, inputs.updatable
);
}
return inputs.pointsMesh;
}
updatePointsInstances(group: Group, positions: Inputs.Base.Point3[]): void {
const children = group.children as InstancedMesh[];
const po = {};
positions.forEach((pos, index) => {
po[index] = new Vector3(pos[0], pos[1], pos[2]);
});
children.forEach((child: InstancedMesh) => {
const index = child.userData.index;
const p = po[index];
child.position.set(p.x, p.y, p.z);
});
}
drawCurves(inputs: Inputs.Verb.DrawCurvesDto<Group>): Group {
const points = inputs.curves.map(s => ({ points: s.tessellate() }));
return this.drawPolylinesWithColours({ polylines: points, polylinesMesh: inputs.curvesMesh, ...inputs });
}
drawSurfacesMultiColour(inputs: Inputs.Verb.DrawSurfacesColoursDto<Group>): Group {
Iif (inputs.surfacesMesh && inputs.updatable) {
inputs.surfacesMesh.clear();
} else {
inputs.surfacesMesh = new Group();
inputs.surfacesMesh.name = `colouredSurfaces-${Math.random()}`;
this.context.scene.add(inputs.surfacesMesh);
}
if (Array.isArray(inputs.colours)) {
inputs.surfaces.forEach((surface, index) => {
const srf = this.drawSurface({
surface,
colours: inputs.colours[index] ? inputs.colours[index] : inputs.colours[0],
updatable: inputs.updatable,
opacity: inputs.opacity,
hidden: inputs.hidden,
});
inputs.surfacesMesh.add(srf);
});
} else E{
inputs.surfaces.forEach((surface, index) => {
const srf = this.drawSurface({
surface,
colours: inputs.colours,
updatable: inputs.updatable,
opacity: inputs.opacity,
hidden: inputs.hidden,
});
inputs.surfacesMesh.add(srf);
});
}
return inputs.surfacesMesh;
}
private createPointSpheresMesh(
meshName: string, positions: Inputs.Base.Point3[], colors: string[], opacity: number, size: number, updatable: boolean): Group {
const positionsModel = positions.map((pos, index) => {
return {
position: pos,
color: colors[index],
index
};
});
const colorSet = Array.from(new Set(colors));
const materialSet = colorSet.map((colour, index) => {
const mat = new MeshBasicMaterial({ name: `mat-${Math.random()}` });
mat.opacity = opacity;
mat.color = new Color(colour);
const positions = positionsModel.filter(s => s.color === colour);
return { hex: colorSet, material: mat, positions };
});
const pointsGroup = new Group();
pointsGroup.name = meshName;
this.context.scene.add(pointsGroup);
materialSet.forEach(ms => {
const segments = ms.positions.length > 1000 ? 1 : 6;
const geom = new SphereGeometry(size, segments, segments);
ms.positions.forEach((pos, index) => {
const instance = new InstancedMesh(geom, ms.material, 1);
instance.name = `point-${index}-${Math.random()}`;
instance.position.set(pos.position[0], pos.position[1], pos.position[2]);
instance.userData = { index: pos.index };
instance.visible = true;
pointsGroup.add(instance);
});
});
return pointsGroup;
}
createOrUpdateSurfacesMesh(
meshDataConverted: { positions: number[]; indices: number[]; normals: number[]; uvs?: number[] }[],
group: Group, updatable: boolean, material: MeshPhysicalMaterial, addToScene: boolean, hidden: boolean
): Group {
const createMesh = () => {
const geometries: BufferGeometry[] = [];
meshDataConverted.forEach(mesh => {
const geometry = new BufferGeometry();
geometry.setAttribute("position", new BufferAttribute(Float32Array.from(mesh.positions), 3));
geometry.setAttribute("normal", new BufferAttribute(Float32Array.from(mesh.normals), 3));
if (mesh.uvs) {
geometry.setAttribute("uv", new BufferAttribute(Uint32Array.from(mesh.uvs), 2));
geometry.setAttribute("uv2", new BufferAttribute(Uint32Array.from(mesh.uvs), 2));
}
geometry.setIndex(new BufferAttribute(Uint32Array.from(mesh.indices), 1));
geometries.push(geometry);
});
return geometries;
};
if (group && updatable) {
group.clear();
const geometries = createMesh();
geometries.forEach(geometry => {
if (material) {
group.add(new Mesh(geometry, material));
} else E{
group.add(new Mesh(geometry));
}
});
} else {
let scene = null;
Eif (addToScene) {
scene = this.context.scene;
}
group = new Group();
group.name = `surface-${Math.random()}`;
scene.add(group);
const geometries = createMesh();
geometries.forEach(geometry => {
if (material) {
group.add(new Mesh(geometry, material));
} else E{
group.add(new Mesh(geometry));
}
});
}
if (hidden) {
group.visible = false;
}
return group;
}
drawSurface(inputs: Inputs.Verb.DrawSurfaceDto<Group>): Group {
const meshData = inputs.surface.tessellate();
const meshDataConverted = {
positions: [],
indices: [],
normals: [],
};
let countIndices = 0;
meshData.faces.forEach((faceIndices) => {
countIndices = this.parseFaces(faceIndices, meshData, meshDataConverted, countIndices);
});
const pbr = new MeshPhysicalMaterial();
pbr.name = `pbr-${Math.random()}`;
pbr.color = new Color(Array.isArray(inputs.colours) ? inputs.colours[0] : inputs.colours);
pbr.metalness = 0.5;
pbr.roughness = 0.7;
pbr.opacity = inputs.opacity;
pbr.alphaTest = 1;
return this.createOrUpdateSurfacesMesh(
[meshDataConverted],
inputs.surfaceMesh,
inputs.updatable,
pbr,
true,
inputs.hidden,
);
}
private parseFaces(
faceIndices: any,
meshData: any,
meshDataConverted: { positions: number[]; indices: number[]; normals: number[]; },
countIndices: number): number {
faceIndices.reverse().forEach((x) => {
const vn = meshData.normals[x];
meshDataConverted.normals.push(vn[0], vn[1], vn[2]);
const pt = meshData.points[x];
meshDataConverted.positions.push(pt[0], pt[1], pt[2]);
meshDataConverted.indices.push(countIndices);
countIndices++;
});
return countIndices;
}
private makeMesh(inputs: { updatable: boolean, opacity: number, colour: string, hidden: boolean }, meshToUpdate: Group, res: { positions: number[]; normals: number[]; indices: number[]; transforms: []; }) {
const pbr = new MeshPhysicalMaterial();
pbr.name = `jscadMaterial-${Math.random()}`;
pbr.color = new Color(inputs.colour);
pbr.metalness = 0.4;
pbr.roughness = 0.6;
pbr.alphaTest = inputs.opacity;
pbr.polygonOffsetFactor = 0;
this.createMesh(res.positions, res.indices, res.normals, meshToUpdate, res.transforms, inputs.updatable, pbr);
Iif (inputs.hidden) {
meshToUpdate.visible = false;
}
return meshToUpdate;
}
private createMesh(
positions: number[], indices: number[], normals: number[], jscadMesh: Group, transforms: number[], updatable: boolean, material: MeshPhysicalMaterial
): void {
const geometry = new BufferGeometry();
geometry.setAttribute("position", new BufferAttribute(Float32Array.from(positions), 3));
geometry.setIndex(new BufferAttribute(Uint32Array.from(indices), 1));
geometry.computeVertexNormals();
const matrix4 = new Matrix4();
matrix4.fromArray(transforms);
jscadMesh.clear();
jscadMesh.add(new Mesh(geometry, material));
jscadMesh.applyMatrix4(matrix4);
}
private async handleDecomposedMesh(inputs: Inputs.OCCT.DrawShapeDto<Inputs.OCCT.TopoDSShapePointer>, decomposedMesh: Inputs.OCCT.DecomposedMeshDto, options: Inputs.Draw.DrawOcctShapeOptions) {
const shapeGroup = new Group();
shapeGroup.name = "brepMesh-" + Math.random();
this.context.scene.add(shapeGroup);
let dummy;
Eif (inputs.drawFaces && decomposedMesh && decomposedMesh.faceList && decomposedMesh.faceList.length) {
let pbr;
if (options.faceMaterial) {
pbr = options.faceMaterial;
} else {
const hex = Array.isArray(inputs.faceColour) ? inputs.faceColour[0] : inputs.faceColour;
const alpha = inputs.faceOpacity;
const zOffset = inputs.drawEdges ? 2 : 0;
const materialCached = this.usedMaterials.find(s => s.sceneId === this.context.scene.id && s.hex === hex && s.alpha === alpha && s.zOffset === zOffset);
this.usedMaterials = this.usedMaterials.filter(s => s.sceneId === this.context.scene.id);
if (materialCached) {
pbr = materialCached.material;
} else {
const pbmat = new MeshPhysicalMaterial();
pbmat.color = new Color(hex);
pbmat.metalness = 0.4;
pbmat.roughness = 0.8;
pbmat.alphaTest = alpha;
pbmat.polygonOffset = true;
pbmat.polygonOffsetFactor = zOffset;
this.usedMaterials.push({
sceneId: this.context.scene.id,
hex,
alpha: alpha,
zOffset: zOffset,
material: pbmat
});
pbr = pbmat;
}
}
const meshData = decomposedMesh.faceList.map(face => {
return {
positions: face.vertex_coord,
normals: face.normal_coord,
indices: face.tri_indexes,
uvs: face.uvs,
};
});
const mesh = this.createOrUpdateSurfacesMesh(meshData, dummy, false, pbr, true, false);
shapeGroup.add(mesh);
}
Eif (inputs.drawEdges && decomposedMesh && decomposedMesh.edgeList && decomposedMesh.edgeList.length) {
const polylineEdgePoints = [];
decomposedMesh.edgeList.forEach(edge => {
const ev = edge.vertex_coord.filter(s => s !== undefined);
polylineEdgePoints.push(ev);
});
const line = this.drawPolylines(undefined, polylineEdgePoints, false, inputs.edgeWidth, inputs.edgeOpacity, inputs.edgeColour);
shapeGroup.add(line);
}
if (inputs.drawVertices && decomposedMesh && decomposedMesh.pointsList && decomposedMesh.pointsList.length) {
const mesh = this.drawPoints({
points: decomposedMesh.pointsList,
opacity: 1,
size: inputs.vertexSize,
colours: inputs.vertexColour,
updatable: false,
});
shapeGroup.add(mesh);
}
if (inputs.drawEdgeIndexes) {
const promises = decomposedMesh.edgeList.map(async (edge) => {
let edgeMiddle = edge.middle_point;
Iif (edgeMiddle === undefined) {
edgeMiddle = this.computeEdgeMiddlePos(edge);
}
const tdto = new Inputs.JSCAD.TextDto();
tdto.text = `${edge.edge_index + 1}`;
tdto.height = inputs.edgeIndexHeight;
tdto.lineSpacing = 1.5;
const t = await this.solidText.createVectorText(tdto);
const texts = t.map(s => {
const res = s.map(c => {
return [
c[0],
c[1] + 0.05,
0
] as Inputs.Base.Vector3;
});
const movedOnPosition = res.map(r => this.vector.add({ first: r, second: edgeMiddle }));
return movedOnPosition as Inputs.Base.Vector3[];
});
// texts.forEach(te => textPolylines.push(te));
return texts;
});
const textPolylines = await Promise.all(promises);
const edgeMesh = this.drawPolylines(undefined, textPolylines.flat(), false, 0.2, 1, inputs.edgeIndexColour);
shapeGroup.add(edgeMesh);
}
if (inputs.drawFaceIndexes) {
const promises = decomposedMesh.faceList.map(async (face) => {
let faceMiddle = face.center_point;
Iif (faceMiddle === undefined) {
faceMiddle = this.computeFaceMiddlePos(face.vertex_coord_vec) as Inputs.Base.Point3;
}
const tdto = new Inputs.JSCAD.TextDto();
tdto.text = `${face.face_index}`;
tdto.height = inputs.faceIndexHeight;
tdto.lineSpacing = 1.5;
const t = await this.solidText.createVectorText(tdto);
const texts = t.map(s => {
const res = s.map(c => {
return [
c[0],
c[1] + 0.05,
0
] as Inputs.Base.Point3;
});
const movedOnPosition = res.map(r => this.vector.add({ first: r, second: faceMiddle }));
return movedOnPosition as Inputs.Base.Point3[];
});
return texts;
});
const textPolylines = await Promise.all(promises);
const faceMesh = this.drawPolylines(undefined, textPolylines.flat(), false, 0.2, 1, inputs.faceIndexColour);
faceMesh.parent = shapeGroup;
}
return shapeGroup;
}
private drawPolylines(lineSegments: LineSegments, polylinesPoints: Inputs.Base.Vector3[][], updatable: boolean,
size: number, opacity: number, colours: string | string[]) {
if (polylinesPoints && polylinesPoints.length > 0) {
const lineVertices = [];
polylinesPoints.forEach(pts => {
for (let i = 0; i < pts.length - 1; i++) {
const c = pts[i];
const n = pts[i + 1];
lineVertices.push(new Vector3(
c[0],
c[1],
c[2]
));
lineVertices.push(new Vector3(
n[0],
n[1],
n[2]
));
}
});
let lines: LineSegments;
if (lineSegments && updatable) {
if (lineSegments?.userData?.linesForRenderLengths === polylinesPoints.map(l => l.length).toString()) {
lineSegments.geometry.clearGroups();
lineSegments.geometry.setFromPoints(lineVertices);
return lineSegments;
} else {
lines = this.createLineGeometry(lineVertices, colours, size);
lines.userData = { linesForRenderLengths: polylinesPoints.map(l => l.length).toString() };
return lines;
}
} else {
lines = this.createLineGeometry(lineVertices, colours, size);
lines.userData = { linesForRenderLengths: polylinesPoints.map(l => l.length).toString() };
return lines;
}
} else E{
return undefined;
}
}
private createLineGeometry(lineVertices: any[], colours: string | string[], size: number) {
const lineGeometry = new BufferGeometry().setFromPoints(lineVertices);
const color = Array.isArray(colours) ? new Color(colours[0]) : new Color(colours);
const lineColors = [];
for (let i = 0; i < lineVertices.length; i++) {
lineColors.push(color.r, color.g, color.b);
}
lineGeometry.setAttribute("color", new Float32BufferAttribute(lineColors, 3));
const lineMaterial = new LineBasicMaterial({
color: 0xffffff, linewidth: size, vertexColors: true
});
const line = new LineSegments(lineGeometry, lineMaterial);
line.name = "lines-" + Math.random();
return line;
}
}
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